Fig. 5.

Chemical shift perturbation analyses of GerIA^NTD in the presence of inosine or uridine. (A) Close-up views of the two selected regions of the superimposed ¹H-¹⁵N HSQC spectra of the ¹⁵N-labeled GerIA^NTD before (blue) and after addition of 10 mM (green) or 40 mM (red) unlabeled inosine, with the arrows marking peaks exhibiting large chemical shift perturbations. (B) The same regions of the ¹H-¹⁵N HSQC spectra of the ¹⁵N-labeled GerIA^NTD before (blue) and after addition of 40 mM unlabeled uridine (red).